To answer myself, current master snapshot (r13021) works!
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To answer myself too, I figured my internet provider router was configured in 5G on a weird debug chanel (112). So, this is why it was not working - I guess - because meanwhile I got back to stock (not working) and then to padavan (where, while doing the config, I figured out that stupid issue).
But I bet it would work good on OpenWRT also, but I have now a good working conf and will stay on it 
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Can you please help with switching from padavan to openwrt? I have dual boot using breed bootloader and I can switch between stock and padavan but the normal way of installing openwrt do not work. Is there any way I can install openwrt without removing breed bootloader or is there a way to use padavan to install openwrt?
I saw somewhere on the forum script that trims(do some magic 
) original firmware to fit breed-bootloader. If you have a problem find it, look on 4pda.ru Xiaomi router 3g topic.
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I found it on 4pda: https://4pda.ru/forum/index.php?showtopic=837667&st=6080#entry76121038
content of create_openwrt_for_breed.cmd
@echo off
if "%~1" neq "" (echo %~1) else (goto help)
del /q /f openwrt_for_breed*.bin >nul
del /q /f ~tempfile* >nul
del /q /f ~kernel* >nul
set size=0
copy /A %1 ~kernel0~
for %%I in (~kernel0~) do set/A size=4194304-%%~zI
fsutil file createnew ~tempfile %size%
copy /b ~kernel0~+~tempfile ~kernel0
del /q /f ~tempfile >nul
del /q /f ~kernel0~ >nul
for %%I in (%1) do set/A size=4194304-%%~zI
fsutil file createnew ~tempfile %size%
copy /b %1+~tempfile ~kernel1
del /q /f ~tempfile >nul
copy /b ~kernel0+~kernel1+%2 openwrt_for_breed.bin
del /q /f ~kernel* >nul
del /q /f ~tempfile* >nul
exit
:help
echo.
echo This will make OpenWrt binary file for using with Breed for Mi Router 3G.
echo Result file is Broken Kernel 4Mb + Kernel 4Mb + Rootfs0
echo.
echo Warning! You MUST add string in Breed for booting from 0x600000:
echo autoboot.command boot flash 0x600000
echo (see example at http://4pda.ru/forum/index.php?s=&showtopic=837667&view=findpost&p=71453185)
echo.
echo Usage:
echo create_openwrt_for_breed.cmd {kernel1 file} {rootfs0 file}
echo.
echo Example: %0
echo create_openwrt_for_breed.cmd xxx-kernel1.bin xxx-rootfs0.bin
echo.
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Hello, have you been able to solve it? I had the same problems, there is a bug in an application file, the name of the process is wrong. You can solve it by editing the file minidlna.lua. Here it is explained https://github.com/openwrt/luci/commit/0d68d0ad7bd2ab036caba973daa85864f8ec81a3
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Thanks for your help, I have already solved it.
UPnP doesn't work for me in 19.07.2.... I have already added the upnp application, flagged the start up option but no deal... not sure what's wrong, whether it's in OpenWRT itself or the specific version for the Xiaomi 3G...
bug in openwrt, been for a long time afaik
Anyone tried upgrading to 19.07.3?
It works fine here.
Except that 5ghz sucks bigtime when using it as both AP and mesh backhaul.
Background: When using this device as a repeater, and also using the 5G band as both client and AP, you need to manually set fragmentation threshold on client to 2347 or the tx speed will drop down to almost zero.
The same happens when you use the device as both as mesh device with the backhaul on 5G (meaning AP+mesh), only the manually setting the fragmentation threshold doesn`t fix it. If anyone found a workaround, please tell.
EDIT: Seems to work if I removed the manual fragmentation threshold setting. (Guess I was too proactive)
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Hey, guys. Are there specific instructions about how to move from Padavan to OpenWRT. Also, can anyone recommend me builds with the bare minimum setup? I remember some people where making those available a couple of years ago.
Hello,
I have a Mi 3G router with openWRT on it. But since the 19 update, it have very slow internet connection.
I saw a bug in the bug report about this.
So i wanted to try X-WRT ( https://downloads.x-wrt.com/rom/ ) .
How can i switch to X-WRT ?
If i connect in ssh (in OpenWRT) and do these steps, does it works?
mtd write x-wrt-8.0-b202006050636-ramips-mt7621-xiaomi_mir3g-squashfs-kernel1.bin kernel1
mtd write x-wrt-8.0-b202006050636-ramips-mt7621-xiaomi_mir3g-squashfs-rootfs0.bin rootfs0
nvram set flag_try_sys1_failed=1
nvram commit
reboot
Or do i need to go back to stock firmware?
Thanks for help
If you install the Breed bootloader, then you can flash an openwrt image that been padded.
Thanks,
how do i install breed bootloader?
like this ?
opkg update
opkg install kmod-mtd-rw
insmod mtd-rw i_want_a_brick=1
mtd unlock /dev/mtd0
mtd -r write /root/breed-mt7621-xiaomi-r3g.bin Bootloader
reboot
I'm also trying to move from Padavan to OpenWRT and was successful in creating the padded image file.
In Breed's Firmware Update page, am I picking Bootloader or Firmware or EEPROM to flash this image?
Thanks.
I have no experience with breed, but it's obvious that you should use Firmware.